L.E.D lighting and relative temperatures

Ok so im thinking about led lights, mainly to save on my power bill, and also to try them out, few questions...

What sort of yield should i expect comparing to a 400 w hps lamp ? And then im thinking ill need a temp controlled heater for lights on, and another for lights off, dont want massive temp changes...

Can anyone pls advise ?

It’s impossible to know how you will get along with your led light because you didn’t tell us what light your getting. But a good 400 watt led should out grow a 400 watt hid. Look for about a 300 watt led if you want to compete with 400 hid.
I’m not sure why you want control over day and night temps but inkbird sells a controller capable of doing just that.
Remember led grow rooms require slightly higher ambient temps so the savings won’t be as big as some think.

Instead of wasting power running a heater, why not add a little HID to the lighting so you can get more than just heat from that energy expenditure? CMH can add a little heat and some great light spectrum

I control my day/nite temps and humidity levels with an Autopilot greenhouse master controller..

i was reading that these plants dont like massive temp fluctuations between lights on and off ....i will start looking into this more and more so thanks guys.

Any paticular led lights o should be looking at guys? been a hid fan for 7 years, lol

iNFID3L said:

i was reading that these plants dont like massive temp fluctuations between lights on and off ....i will start looking into this more and more so thanks guys.

Any paticular led lights o should be looking at guys? been a hid fan for 7 years, lol

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With quality efficient diodes you save about a third on power usage or with the same wattage can add a 3rd more light intensity, that's a very rough ball park figure.

Most popular due to efficiency is Samsung diodes, you can look at quantum boards or strips using the same diodes or look at COB fixtures like timbergrowlights make.

I would go and google LEDgardener for lots of info and look for greengenes on youtube , lots of folks to look at on youtube but greengenes I know is still putting up grow vids and showing his stuff. He also is behind the company PLC.

iNFID3L said:

i was reading that these plants dont like massive temp fluctuations between lights on and off

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My rooms go from 89-90F down to 68 F without issues. Where problems can arise is if you have warm humid air, it cools causing the RH% to rise. If you have that controlled by dehumidification or ventilation then it's not a problem IMO.

ok so i have some reading to do now at least , thanks guys

I went from 2x 400watt hps/mh in a dual bulb hood to 550 total watts of COBs.

The COBs out Grow the HID for sure in my experience.

I built my COB light inside my old HID air cooled XXL hood. Thinking it would give me the best temp control

I had issues with low temps with lights on. So I ended up dumping the heat from the hood back into the tent most of the year. In the heat of the summer I duct it out of the tent.

I have mine is 400watt kit from timber grow lights. and a spare mars hydro 100watt cob in the middle.

Renfro said:

Instead of wasting power running a heater, why not add a little HID to the lighting so you can get more than just heat from that energy expenditure? CMH can add a little heat and some great light spectrum

I control my day/nite temps and humidity levels with an Autopilot greenhouse master controller..

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I second this. Heaters take up tons of electricity and you can get "free" heat from a good enough HID light. If you're running a 400w SE bulb, I'm guessing that's all your space allows for? I agree with Renfro, look into a 315w CMH. Should solve your temp issues, improve yields and quality, and even save you money on electricity due to using 85w less and not having to run a heater. I'd recommend a DE HPS dimmed down to 600w if you have the space, working awesome for me in my 4x4 tent.

If you're still having problems keeping the tent warm go grab yourself the thickest rigid insulation boards you can find, if you can't find 2in. thick boards then stack two 1in. boards on top of each other to help keep the heat in your tent. You'll save so much more money getting rid of the heater than you will by switching to LED.

kratos015 said:

I'd recommend a DE HPS dimmed down to 600w ...

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Better to go with a 630 watt DE HPS and not dim as dimming changes the spectrum.